/home/rafl

$ history 1|awk '{print $2}'|awk 'BEGIN {FS="|"} {print $1}' \
  |sort|uniq -c | sort -r |head -10

On my laptop:

1557 vi
 710 perl
 692 man
 661 cd
 648 ac
 513 sudo
 510 grep
 499 rm
 388 ls
 180 wajig

On weedy.perldition.org, my server:

1967 sudo
1052 vi
 810 cd
 766 l
 352 screen
 316 perl
 250 ..
 213 wajig
 212 find
 194 rm

.. expands to cd ..

l is shorthand for ls

and ac is my alias for apt-cache.